
public class Stopwatch {
	private final long start;

	   /**
	     * Create a stopwatch object.
	     */
	    public Stopwatch() {
	        start = System.currentTimeMillis();
	    } 


	   /**
	     * Return elapsed time (in seconds) since this object was created.
	     */
	    public double elapsedTime() {
	    	
	        long now = System.currentTimeMillis();
	        return (now - start) / 1000.0;
	    }
}
